Does Textblade allow the reader to forward-delete, as opposed to the backward-delete that is all that is allowed on Apple devices such as the iPAD? If it does allow this, can it be done as-is, or does it require programming a key combination?

If you watch the MultiLayer Keys video, you'll see how the SpaceBlade provides instant access to a new layer of symbols and functions - without moving any of your fingers, or requiring extra keys that are hard to reach.

Forward delete works this same way. When the SpaceBlade is down, you can forward delete by pressing the Backspace key.